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Eccentricity
Move the left focal point and the directrix to change the eccentricity and see how it affects the shape of the conic. What eccentricity gives you a parabola, an ellipse, and a hyperbola? Do you ever get a circle? If you are a student, discuss this with other students. If you are a teacher, this is a good program to project onto a screen or board and demonstrate to the class.
Open 'Eccentricity' in a Separate, Resizable Window
The original size of the program is four times larger than above. You may want to click on the link to open the program in a separate window.
Created: July 25, 2010Updated: August 11, 2010
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